Binocular telescopic magnifying spectacles

ABSTRACT

Binocular telescopic magnifying spectacles, both telescopes of which are pivotally mounted on a common plane, wherein each imaginary pivoting axis ( 8 ) of the telescopes  91 ) lies outside the telescopes ( 1 ) and on the side opposite the telescopes ( 1 ) of the ocular exit pupil ( 9 ) at a distance (d) from the ocular exit pupil ( 9 ), which is smaller than the diameter of the eye (D). The adjustment device for convergence and the adjustment device for the distance are mechanically coupled.

The invention relates to binocular telescopic magnifying spectacles withfeatures recited in the preamble of claim 1.

Such binocular telescopic magnifying spectacles or close-up spectaclesare designed as visual aids for weak-sighted and as operationalspectacles. To this end, they are adjusted by the user in accordancewith a distance between the eyes. In case the telescopic magnifyingspectacles need be used for different operational distances, the pupildistance even for the same user does not remain constant at thedifferent operational distances. For an infinite distance, the visualaxes of the eyes remain parallel, for a close-up region, they converge,whereby, on one hand, the angle of the visual axes changes, and, on theother hand, the pupil distance diminishes. Further, with convergence,the distance of the eye pupils from the apparatus (cornea vertexdistance) changes.

In the known telescopic magnifying spectacles, the above-mentionedconditions are partially adjusted. In the binocular telescopicmagnifying spectacles according to German Publication DE 40 04 248 A1, acorrect axis setting is effected along an arc the center of which liesin the eye center, however no coupling of the axis setting with thedistance setting takes place. This means that the user should set acorrect axis setting for a predetermined distance or set a correctdistance for a predetermined axis setting. Further, the axis setting ofthe right and left tubes should be done separately, which createsadditional operational difficulties. In the known binocular telescopicmagnifying spectacles according to Austrian publication AT 000 307 U1,the distance between the tube axes is adjusted with a servo motor to acorrect parallax in accordance with the distance. However, this movementis rectilinear so that the apparatus pupils are spaced from the eye withan increasing convergence, whereby the observable visual field isessentially trimmed when the apparatus is supported by an end collar. Inthe known binocular telescopic magnifying spectacles according to 98 782B, the axis setting takes place along a spatial curve which is definedby an outer link secured at one side. At the convergence, the apparatushorizon changes. Likewise, for retaining the cornea distance, thehorizon should be retained.

For all of the above-described and known apparatuses, it is common thatthey cannot be used as binoculars, in which only the eye distance andthe distance need be set, rather additional, time-consuming, complicatedand excessive settings to be effected by a user are required.

An object of the invention is to eliminate these drawbacks and tosimplify the setting of the binocular telescopic magnifying spectacleswhich, according to the invention, is achieved by features and measureswhich form the content and the subject matter of the characterizedclause of claim 1. The eye diameter in an adult amounts to about 24 mm.Because the pivot axes of both telescope optics are spaced from ocularexit pupils, with smaller eye diameters, lie the pivot axes,respectively, inside the eyes of a user. Thereby, by a change of theoperational distance and thereby of the convergence angle, the settingwith respect to a changing pupil distance is essentially retained.Advantageously, the pivot axes are spaced from the ocular exit pupils,respectively, by approximately a half of the eye diameter, i.e., theylie in the eye center or the rotational center of the eye of the user,whereby the setting with respect to the eye distance, with a change ofthe operational distance, is retained to a most possible degree.Preferred embodiments of the invention are recited in dependent claims.

The invention will now be explained in detail with reference to thedrawings, without limiting the invention to the shown embodiments. It isshown in:

FIG. 1 a schematic view of telescopic magnifying spectacles;

FIG. 2 a perspective view of an embodiment of telescopic magnifyingspectacles;

FIG. 3 a plan view of the telescopic magnifying spectacles after theremoval of the housing;

FIG. 4 a front view;

FIG. 5 a bottom view;

FIG. 6 a structural component with a control crank;

FIG. 7 a perspective angular view of a holder for a telescope;

FIGS. 8-10 plan, evaluational and side views, respectively, of aU-shaped part;

FIG. 11 a plan view of an inner side of a housing portion;

FIG. 12 its elevational view;

FIG. 13 a further schematic view; and

FIG. 14 a cross-sectional view along line A—A in FIG. 13.

A binocular telescopic magnifying spectacles include, in a conventionalmanner, left and right telescopes 1 which contain, respectively, anobject lens 2, a reversing system or a reversing prism 3, and an ocular4. Each of the telescopes 1 defines an ocular exit pupil 9 whichrepresents an aperture stop and is spaced from the ocular 4 by adistance from 10 mm to 20 mm. The telescope 1 is so designed that duringthe use of the inventive telescopic magnifying spectacles, the cornea ofthe eye of a user lies somewhere in the region of the ocular exit pupil9.

The telescopic 1 are pivotally supported in a plane in a housing 5. Tothis end, there are provided arcuate guideways 6 along which,respectively, likewise arcuate slides 7 are displaced, which areconnected with respective telescopes 1. The center of circles of theguideways 6 form imaginary pivot axes 8 of the telescopes 1. In eachposition of the slides 7 on the guideways 6, the optical axes 25 of thetelescopes 1 extend, respectively, radially to the guideways 6. Theimaginary pivot axes 8 intersect, outside of the telescopes 1, theirrespective optical axes 25, in effect, at a distance of from arespective ocular exit pupil 9, which is smaller than the outer diameterD that amounts up to about 24 mm. Thereby, the imaginary pivot axis 8lie within eyes 10 of the user. Advantageously, the imaginary pivot axes8 are spaced from the respective ocular exist pupils 9 by from about 5mm to about 20 mm.

In a convergence position of the eyes 10 at a convergence angle 11, theeyes 10 pivot about a pivot point that is spaced from the cornea byabout 13.5 mm. Thereby the effective pupil distance is reduced at anincreased convergence position of the eye 10. The magnifying spectaclesfollow this reduction of the pupil distance, only upon increase of theconvergence angle 11, to a most possible extent. This is because theimaginary pivot axes 8 of the telescopes 1 lie inside of the eyes 10 ofthe user (in the drawings, for the sake of clarity, the ocular exitpupils 9 are shown only for the position of the telescopes 1 in whichthey extend parallel to each other). The smallest deviation takes placewhen the pivot points of the eyes and the pivot axes 8 coincide to amost possible extent. Therefore, in an advantageous embodiment of theinvention, the distance between the ocular exit pupils 9 and pivot axes8 amounts to about 13 mm.

The preliminary setting of the pupil distance, e.g., at focusing at aninfinite object point, is effected with a set wheel 12. It has nutswhich cooperate with draw-in bolts 13 with opposed threads which areconnected with the guideways 6 or with parts connected with them. Thispupil setting device also provides for displacement of the guideways 6transverse to a center plane 26 of the housing 5 whereby a distancetherebetween is adjusted.

For setting the convergence position of the telescopes 1, a set wheel 14is provided. A pivotal movement of the set wheel 14 is transmitted byshafts 15 to respective eccentrics 16 which are mounted on the free endsof the respective shafts 15 and which have, on their front sides, screwsurfaces which are engaged by members 17 fixedly connected withrespective telescopes 1. The members 17 are biased against therespective screw surfaces by helical springs 18 which are supportedagainst the end surfaces of the guideways 6 and bias the slides 7. Attheir rear sides, the eccentrics 16 are supported against members 19fixedly connected with respective guideways 6. For adaptation todifferent eye distance settings effected with the set wheel 12, eachshaft 15 has a length compensating member 20, which is shaped, e.g., asa profiled shaft and which does not rotate relative to a sleeve but isdisplaceable relative thereto in the axial direction.

The set wheel 14 connects the pivotal movements of both telescopes sothat they have each the same convergence angle 11.

Further, there is provided a coupling device for coupling convergencesetting with focusing or the distance setting of the telescopes. Thecoupling device has control members 21 which are fixedly connected withthe guideways 6 and which have each at its side adjacent to the ocular,a control cam 22. The control cam 22 is engaged by an end of a controlpin 23 the opposite end of which is connected with the object lens 2displaceable along the optical axis 25. Upon a pivotal movement of thetelescope 1, the control pin 23 slides along the control cam 22 wherebythe axial position of the object lens 2 is so changed that the focus isretained at different convergence angles 11.

According to another embodiment of the invention, it is possible toprovide a control system inverse to the above-described system, i.e.,one which would change the focus instead of the convergence angle.

In the schematically shown embodiment, behind the object lens, there isprovided, in the optical path, a pivotal lens 24, preferably, a pluslens. With pivotal movement of this lens 24, simultaneously, the lengthcompensating member for changing the length of the control pin 23 alsoshould be pivoted to retain the focus. By the pivotal movement of thelens 24, the magnification can be changed, at a constant workingdistance, preferably with the aid of the length compensating member,without the focus readjustment.

In accordance with a further advantageous embodiment of the presentinvention, both the reversing prisms 3 and the object lens 2 are axiallydisplaceable, and their position is connected with the convergence angle11. In a simplified case, the reversing prism 3 is fixedly connectedwith the object lens 2. However, separate control cams and pins can beprovided. The coupling of the axial position of the reversing prisms 3with the convergence angle 11 permits to set the distance of thereversing prisms from an intermediate image and thereby even at smalldimensions of the reversing prisms, a most possibly large field ofvision can be achieved.

The optimization of the opposite requirements between the maximal imagefield and the usable sizes of the apparatuses is solved by providingoculars for the inventive binoculars telescopic glasses which haveadvantageously a substantially rectangular surface with a format of a tvimage (with a length to width ratio 4:3). To this end, two circularsections are cut off or ground off from a circular ocular by twoparallel cuts. It is advantageous when an appearance of a rectangular,landscape image is seen as being substantially of the same size as anappearance of a circular image having a diameter corresponding to thelarger side of the rectangle. Also, the rectangular shape of the ocularlenses results in a reduced weight. It is further advantageous when withsuch formation of the oculars, at least a portion of the field stop orthe aperture stop, advantageously, the entire field or aperture stophave a rectangular shape, preferably with a length-to-width ratio of4:3.

A concrete embodiment of the above-described binocular telescopicmagnifying spectacles will be described below with reference to FIGS.2-12, wherein the elements corresponding to those shown in the schematicview of FIG. 1 will be designated with the same reference numerals. Thebinocular telescopic magnifying spectacles have a body 5 with upper andlower body shells 27 and 28. Two lenses 2 are visible at the front side29. Sidewise arranged set screws 30 serve for the eyesight corrections.The set wheel 12 is used for the setting of the pupil distance, and theset wheel 14 is used for the setting of the convergence. FIGS. 3 to 5show the construction of the binocular telescopic magnifying spectacleswith the body 5 being removed.

Tubes 32 and 33 are supported, in an aligned arrangement, in aparallelpiped-shaped holder 31 for axial displacement, with one tube 32receiving the respective ocular 4 and the other tube 33 receiving theobject lens 2 and the reversing prisms 3. An elongate groove 34 isprovided on the upper side of the holder 31. A control pin 23 extendsthrough the elongate groove 34 and has its other end connected with thetube 33 of the object lens 2. Further, an axially extending cut-out 36,which is open at one of its sides, is formed on the upper side of theholder 31. A tooth rack 37, which is connected fixedly with the tube 32of the ocular 4, lies in the cut-out 36. A one-sided, flanged-on support38 serves for receiving the set screw 30. A slide 7 is secured on thebottom of the holder 31, not visible in FIG. 7. The two tubes 32 and 33,together with optical lenses, form a telescope 1.

Each holder 31 is received in a U-shaped member 39 different views ofwhich are shown in FIGS. 8-10. The member 39 has a vertical web 40 andupper and lower cheeks 41 and 42. An arcuate guideway 6 is formed in thelower cheek 42. An inclined control slot 43 is provided in the uppercheek 41 opposite the middle plane 26. A tooth rack 44 is also securedto the lower cheek 42. A slot 45 is provided between the vertical web 40and the upper cheek 41. The construction of both U-shaped members is thesame but in a mirror-image presentation, the only difference consistingin different spacing of respective tooth racks 44 from the respectivemembers 29. Thereby, with a functionally identical construction of theholders 31, the two tooth racks are spaced from each other, with apinion 51 (FIG. 3) being arranged in a space therebetween.

A second control slot 46 is contained in the already mentioned slot 45formed in the member 39. The control slot 46 is formed in a strip-shapedconstructional element 47 (FIG. 6) and consists of two rectilinearelongate slots. The strip-shaped constructional element 47 has, on itssmaller sides, upward bent edges 48 and, in the middle, a tooth strip49. The control slot 46 extends rectilinear and at a right angle to thetooth strip 49. The tooth strip 49 is engaged by a pinion 50 which isconnected with the set wheel 14. The above-mentioned pinion 51, whichlies between two tooth racks 44 of the members 39, is connected with theset wheel 12.

When the above-described separate elements are mounted in the housing 5,the lower cheeks 42 of the U-shaped members 39 lie in the groove-likeindentation 52 which is formed in the housing shell 28 (FIG. 11) andwhich serves as a guide. At that, the tooth racks 44 are locatedadjacent to each other. The tooth racks 44, which are secured to therespective members 39, are received in grooves 53 formed in the housingshell 28. The constructional strip-shaped element 47 lies beneath theupper cheek 41 of the member 39 and above the upper side of the holder31. Thereby, the control slots 43 and 46 cross each other, with thecontrol pin 23, which is connected with the object lens-receiving tube33 of the respective telescope 1, lying in the intersection point of thecontrol slots. The upward bent edges 48 of the strip-shapedconstructional element 47, together with the control slot 46, extendinto guide grooves formed in the inner side of the upper housing shell27, not shown here. In the views shown in FIGS. 3-5, the optical axes 25of the telescopes 1 extend parallel to each other. For setting thedistance between the two optical axes 25, the set wheel 12 and thepinion 51, which is connected with the set wheel 12 and lies between thetwo tooth rack 44, are rotated. As a result, the U-shaped members 39 andthe holders 31, which are received therein, together with the telescopes1, are displaced relative to each other in the groove-like indentation52 which is formed in the housing shell 28 and serves as guide. Themembers 39 are displaced, dependent on the rotational direction of thepinion 51, toward or away from each other. During this setting, thecontrol slots 43 and 46 do not change their relative position.

The set screws 30 provide for eyesight compensation in dependence on theoptical characteristics of the user eyes. By the rotation of the setscrews 30, respectively, the tube 32 with the ocular 4 and the tube 33with the object lens 2 are axially adjusted relative to each other.

The convergence of the optical axes 25 is adjusted with the set wheel14. The rotation of the set wheel 14, which remains stationary withrespect to the body 5, causes rotation of the pinion 50 and thereby thedisplacement of the tooth strip 49 in the middle plane 26. Thedisplacement of the tooth strip 49 results in displacement of thestrip-shaped constructional element 47, with its edges 48 being guidedin the body 5, and the accompanying displacement of the control slot 46.Thereby, the control pin 23 and therewith the tube 33, with the objectlens 2, of the holder 31 is axially displaced. Simultaneously, thecontrol pin 23 is displaced along the inclined control slot 43 of thestationary member 39, whereby the holder 31 is pivoted, being movable byits slide along the arcuate driveway 6.

According to a further embodiment of the invention, the control slot 43is pivotable in its plane, whereby its inclination relative the middleplane 26 is changed. To this end, this control slot is provided in acircular disc which itself pivots in or on of the upper cheek 41 of themember 39. Thereby, the optical axes 25 of the telescopes 1 can be setmore steeply with respect to the middle plane 26 at large pupildistances (FIGS. 13 and 14).

From the foregoing description of the binocular telescopic magnifyingspectacles, it follows that first the pupil distance of the user isadjusted and then the operational distance. The axes adjustment isconnected with the distance adjustment along the arcuate guideways 6 sothat the convergence apparatus-eyes-distance does not change. The usercan rapidly adjust near and far distances, without any additionaladjustment. The coupling of the convergence adjustment with the pupildistance adjustment forms a prerequisite for the use of an apparatushaving a standard size by persons with different distances between theeyes. For persons with a large pupil distance, in the near zone, asteeper axes inclination is required for them to clearly see the samenear point than for the persons with a smaller pupil distance. Further,the change of the inclination position of a control slot provides for asimple adaptation to interchangeable optics.

The adjustment of the visual axes of both eyeballs (convergence) iseffected in dependence on the distance adjustment/accommodation and iscontrolled spontaneously, independent from the brain. The purpose of thenovel binocular telescopic magnifying spectacles is to support a normalvisual act which takes place without any auxiliary means. At that, thedistance-dependent accommodation, without which the convergence settingof the eyes is incomplete or is even not initiated, is included or formspart of the control slot. The control slot is calculated based on theobject-width-dependent vergence (inclination of the visual axis) and thefocal-length dependent image width. Taking into account theaccommodation, the image width setting (by displacement of the objectlens) should be reduced, by using the control slot, by the amount of theaccommodation effect of the eyes. This amount is calculated based on theobject lens focal length in diopters plus the accommodation effect ofthe eyes for the corresponding distance in diopters.

Example: Object Width 2 m Object lens focal length 50 mm Image width51.28 mm Ocular focal length 50 D = 20 mm Accommodation .50 D Totaleffect 50.52-19.80 (Ocular & Accommodation) Reduction .2 mm

Equations and tables for a Control Slot of Prism Magnifying Spectacles

with Zoom-Convergence-Distance Adjustment

Object width (a) as a function of a convergence angle$a = \frac{PD}{2{\tan \left( {8,1} \right)}}$ Table  PD = 64$\begin{matrix}a & \ldots & {0{^\circ}} & = & \infty \\\quad & \quad & {1{^\circ}} & = & {1833,{3{mm}}} \\\quad & \quad & {2{^\circ}} & = & {916,{4{mm}}} \\\quad & \quad & {3{^\circ}} & = & {610,{0{mm}}} \\\quad & \quad & {4{^\circ}} & = & {457,{6{mm}}} \\\quad & \quad & {5{^\circ}} & = & {365,{8{mm}}} \\\quad & \quad & {6{^\circ}} & = & {304,{5{mm}}} \\\quad & \quad & {7{^\circ}} & = & {260,{6{mm}}} \\\quad & \quad & {7,{3{^\circ}}} & = & {250,{0{mm}}}\end{matrix}$

Image width (a¹) as a function of a convergence angle$a^{1} = \frac{a \cdot f}{a - f}$Table  PD = 64  f = 34.6  (50.33 + 9D) $\begin{matrix}a & \ldots & {0{^\circ}} & = & {34,{6{mm}}} \\\quad & \quad & {1{^\circ}} & = & {35,{2{mm}}} \\\quad & \quad & {2{^\circ}} & = & {35,{9{mm}}} \\\quad & \quad & {3{^\circ}} & = & {36,{7{mm}}} \\\quad & \quad & {4{^\circ}} & = & {37,{4{mm}}} \\\quad & \quad & {5{^\circ}} & = & {38,{2{mm}}} \\\quad & \quad & {6{^\circ}} & = & {39,{0{mm}}} \\\quad & \quad & {7{^\circ}} & = & {39,{8{mm}}} \\\quad & \quad & {7,{2{^\circ}}} & = & {39,{7{mm}}}\end{matrix}$

LEGENDS FOR THE REFERENCE NUMERALS 1. Telescope 2. Object lens 3.Reversing prism 4. Ocular 5. Body G. Guideway 7. Slide 8. Pivot Axis 9.Ocular exit pupil 10. Eye 11. Covergence angle 12. Set wheel 13.Drawn-in bolt 14. Set wheel 15. Shaft 16. Eccentric 17. Member 18.Helical Spring 19. Member 20. Length compensating member 21. Controlmember 22. Control cam 24. Lens 25. Optical axis 26. Middle plane 27.Body shell 28. Body shell 29. Front side 30. Set screw 31. Holder 32.Tube 33. Tube 34. Elongate slot 35. 36. Cut-out 37. Tooth rack 38.Support 39. Shaped member 40. Vertical Web 41. Upper cheek 42. Lowercheek 43. Inclined control slot 44. Tooth rack 45. Slot 46. Control slot47 Strip-shaped constructional element 48. Edge 49. Tooth strip 50.Pinion 51. Pinion 52. Groove-shaped indentation 53. Groove 54. Pinion

What is claimed is:
 1. Binocular telescopic magnifying spectacles bothtelescopes (1) of which include, respectively, an object lens (2) and anocular (4) and which are supported in a common plane for pivotalmovement about parallel imaginary pivot axes, characterized in that theboth imaginary pivot axes (8) of the telescopes (1) lie outside of thetelescopes (1), respectively, and on a side of the ocular exit pupils(9), remote from the telescopes (1), at a distance (d) from therespective ocular exit pupil (9) which is smaller than the eye diameter(D), and in that the imaginary pivot axes (8) of the telescopes (1)cross, respectively, optical axes (25) of the telescopes (1), and bothtelescopes (1) are displaceable, respectively, along arcuate guideways(6), wherein centers of guideway-defining arcs coincide with theimaginary pivot axes (8) of the telescopes (1), wherein the optical axes(25) of the telescopes (1) extend, respectively, radially to theguideways (6), and the pivotal movements of both telescopes (1) abouttheir imaginary pivot axes (8) are coupled and both telescopes (1) have,respectively, a same convergence angle, wherein there are provided aconvergence setting device for coupling the pivotal movement of bothtelescopes (1) which includes a first set wheel (14) connected with aneccentric (16) that displaces the telescopes (1) along the guideways(6), and a coupling device for coupling a setting of the convergenceangle (11) of the telescopes (1) with a distance setting of thetelescopes, wherein for each telescope (1), at least one control cam isprovided which is engaged by a control pin (23) displaceable in thedirection of the optical axis (25) dependent on the convergence angle(11) of the telescope (1), and the control pin (23) is connected withthe object lens (2) of a respective telescope (1) which is displacedalong the optical axis (25).
 2. Binocular telescopic magnifyingspectacles according to claim 1, characterized in that slides (7) areconnected with the telescopes (1) displaceable along the guideways (6).3. Binocular telescopic magnifying spectacles according to claim 1,characterized in that the pivot axes (8) of the telescopes (1) arespaced from respective ocular exit pupils (9) a distance between 5 and20 mm.
 4. Binocular telescopic magnifying spectacles according to claim3, characterized in that the pivot axes (8) of the telescopes (1) arespaced from the respective ocular exit pupils (9) a distance of about ahalf of an eye diameter (D).
 5. Binocular telescopic magnifyingspectacles according to claim 3, characterized in that the ocular exitpupil (9) lies outside of the ocular (4) of a respective telescope (1)by a distance from 10 mm to 20 mm.
 6. A binocular telescopic magnifyingspectacles according to claim 3, characterized in that the pivot axes(8) of the telescopes (1) are spaced from the respective ocular exitpupils (9) by a distance of 13 mm.
 7. Binocular telescoping magnifyingspectacles according to claim 1, characterized in that each telescope(1) includes a reversing prism (3) located between the object lens (2)and the ocular (4).
 8. Binocular telescopic magnifying spectaclesaccording to claim 7, characterized in that a lens (24) located in anoptical path, pivots between the object lens (2) and the reversing prism(3).
 9. Binocular telescopic magnifying spectacles according to claim 7,characterized in that the reversing prisms (3) are supported with apossibility of axial displacement, and that there is provided a couplingdevice for coupling the axial position of the reversing prisms (3) withone of the convergence angle (11) and with the distance setting. 10.Binocular telescopic magnifying spectacles according to claim 7,characterized in that the coupling device is formed as a rigidconnection between the object lens (2) and the reversing prism (3). 11.Binocular telescopic magnifying spectacles according to claim 1,characterized in that the ocular (4) has a substantially rectangularcross-section, with a length-to-width rate of 4:3.
 12. Binoculartelescopic magnifying spectacles according to claim 11, characterized inthat at least a portion of at least one of visual field stop and anaperture stop has a with a length-to-width ratio of 4:3.
 13. A binoculartelescopic magnifying spectacles both telescopes (1) of which include,respectively, an object lens (2), and an ocular (4) and which aresupported in a common plane for pivotal movement about parallelimaginary pivot axes, characterized in that the both imaginary pivotaxes (8) of the telescopes (1) lie outside of the telescopes (1),respectively, and on a side (1) of the ocular exit pupils (9), remotefrom the telescopes, at a distance (d) from the respective ocular exitpupil (9) which is smaller than the eye diameter (D), and in that theimaginary pivot axes (8) of the telescopes (1) cross, respectively,optical axes (25) of the telescopes (1), and both telescopes (1) aredisplaceable, respectively, along arcuate guideways (6), wherein centersof guideway defining arcs coincide with the imaginary pivot axes (8) ofthe telescopes (1), wherein the optical axes (25) of the telescopes (1)extend, respectively, radially to the guideways (6), and the pivotalmovements of both telescopes (1) about their imaginary pivot axes (8)are coupled and both telescopes (1) have, respectively, a sameconvergence angle, and wherein there is provided a pupil distancesetting device for adjusting the distance of both the imaginary pivotaxes of the telescopes (1) which includes a second set wheel (12)connected with nuts in which drawn-in bolts (13), which are fixedlyconnected with the guideways (6) and which have opposed threads, arereceived.
 14. Binocular telescoping magnifying spectacles according toclaim 13, characterized in that each telescope (1) includes a reversingprism (3) located between the object lens (2) and the ocular (4). 15.Binocular telescopic magnifying spectacles both telescopes (1) of whichinclude, respectively, an object leans (2), and an ocular (4) and whichare supported in a common plane for pivotal movement about parallelimaginary axes, characterized in that the both imaginary pivot axes (8)of the telescopes (1) lie outside of the telescopes (1), respectively,and on a side of the ocular exist pupils (9), remote from the telescopes(1), at a distance (d) from the respective ocular exit pupil (9) whichis smaller than the eye diameter (D), and in that the imaginary pivotaxes (8) of the telescopes (1) cross, respectively, optical axes (25) ofthe telescopes (1) and but telescopes (1) are displaceable,respectively, along arcuate guideways (6), wherein centers ofguideway-defining arcs coincide with the imaginary pivot axis (8) of thetelescopes (1), wherein the optical axes (25) of the telescopes (1)extend, respectively, radially to the guideways (6), and the pivotalmovements of both telescopes (1) about their imaginary pivot axes (8)are coupled and both telescopes (1) have, respectively, a sameconvergence angle, wherein the telescopes (1) are displaceably arrangedin a parallelepiped-shaped holders (31), respectively, with each holder(31) having an elongate groove (34) extending in an axial direction of arespective telescope (1), wherein a control pin (23), which is securedat one end thereof to the respective telescope (1), projects through theelongate groove (34), and wherein the spectacles further include meansfor enabling displacement of the respective telescope (1) axially andangularly and including two control slots (43, 46) through which thecontrol pin (23) projects, with one of the control slots (46) beingarranged in a middle plane (26) of the telescopic magnifying spectaclesand another of the control slots (43) being transversely displaceablerelative to the one of the control slots (46), and with both controlslots (43, 46) intersecting each other.
 16. Binocular telescopicmagnifying spectacles according to claim 15, characterized in that theone of the control slots (46) of the two telescopes extendsperpendicular to the middle plane (26), and in that both another controlslots (43) of the telescopes (1), converge from outside toward themiddle plane (26).
 17. Binocular telescopic magnifying spectaclesaccording to claim 16, characterized in that the another of the controlslots (43) pivot in their plane for changing their angular positionrelative to the middle plane (26).
 18. Binocular telescopic magnifyingspectacles according to claim 15, characterized in that there isprovided a slide (7) at a side of the holder (31) remote from theelongate slot (34).
 19. Binocular telescopic magnifying spectaclesaccording to claim 18, characterized in that the holders (31) arereceived, respectively, in a U-shaped members (39), which abut eachother with their vertical webs (40) whereby their respective cheeks (41,42) become connected, and the one (43) of the control slots is providedin a respective upper cheek (41), and the arcuate guideway (6), in whichthe slide (7) of the holder (31) is located, lies in a lower cheek (42).20. Binocular telescopic magnifying spectacles according to claim 19,characterized in that the arcuate guideways (6)-containing cheeks (42)of respective U-shaped members (39) are arranged in a groove-shapedindentation (52) which extends perpendicular to the middle plane (26),serves as a guide, and is formed in a housing shell (28) in which thetelescopic magnifying spectacles are received.
 21. Binocular telescopicmagnifying spectacles according to claim 19, characterized in that toothracks (44), which extend parallel to each other and perpendicular to themiddle plane (26), are connected with the respective U-shaped members(39), and a pinion (51) is arranged therebetween.
 22. A binoculartelescopic magnifying spectacles according to claim 15, characterized inthat the control slots (46), which are displaceable in the middle plane(26) and extend perpendicular thereto, are provided in a strip-shapedconstructional element (47) having, in its middle section, a tooth strip(49) extending in a displacement direction of the control slot (46) andengageable with a pinion (SO) rotatably supported in a body part, and inthat the side edges (48) of the strip-shaped constructional element(47), which extend parallel to the tooth strip (49), are bent upward andare received in guide grooves formed in a body shell (27).
 23. Binoculartelescoping magnifying spectacles according to claim 15, characterizedin that each telescope (1) includes a reversing prim (3) located betweenthe object lens (2) and the ocular (4).
 24. Binocular telescopicmagnifying spectacles according to the claim 15, characterized in thateach holder (31) is formed as a strip-shaped holder, and in that the oneof the control slots (46) is provided in the strip-shaped holder.
 25. Abinocular telescopic magnifying spectacles both telescopes (1) of whichinclude, respectively, an object lens (2) and an ocular (4) and whichare supported in a common parallel for pivotal movement about parallelimaginary pivot axes, characterized in that the both imaginary pivotaxes (8) for the telescopes (1) lie outside of the telescopes (1),respectively, and on a side of the ocular exit pupils (9), remote fromthe telescopes (1), at a distance (d) from the respective ocular exitpupil (9) which is smaller than the eye diameter (D),and in that theimaginary pivot axes (8) of the telescopes (1) cross, respectively,optical axes (25) of the telescopes, and both telescopes (1) aredisplaceable, respectively, along arcuate guideways (6), wherein centersof the guideway-defining arcs coincide with the imaginary pivot axis (8)of the telescopes (1), and wherein the optical axes (25) of thetelescopes (1) extend, respectively, radially to the guideways (6), thepivotal movements of both telescopes (1) have, respectively, a sameconvergence angle, wherein the object lens (2) of the telescope (1), onone hand, and the ocular (4), on the other hand, are arranged inseparate tubes (32, 33) received in a holder (31), wherein the ocular(4)—receiving tube (32) is displaced relative to the holder (31) by atooth drive, and wherein the ocular (4)—receiving tube (32) has, onouter side thereof, a tooth rack (37) which extends in a axial directionof the tube (32), lies in a slot-like recess (36) of the holder (31),and is engageable with a pinion (54) rotatably support on the holder(31).
 26. Binocular telescoping magnifying spectacles according to claim25, characterized in that each telescope (1) includes a reversing prism(3) located between the object lens (2) and the ocular (4).